Exhaust pipe end cover



Jan. 10, 1950 c. R. TAYLOR 2,494,016

EXHAUST PIPE END COVER Filed March 29, 1945 INVENTOR.

Patented Jan. 10, g 1950 UNITED STATES PATENT OFFICE EXHAUST PIPE ENDCOVER Charles Ralph Taylor, Scott City, Kans.

Application March 29, 1945, Serial No. 585,433

This invention relates to a protecting device in the form of a cover tobe mounted on the open end of a vertical exhaust pipe of a tractor orstationary engine, to exclude the elements and insects which otherwisewould enter the cylinders of an engine through the open end of theexhaust pipe, when the engine is idle, or in storage.

An important object of the invention is to pro vide a protecting coverof this character which is so mounted with respect to balance, that itis exceptionally sensitive in operation, and will open automaticallyunder the influence of the exhaust gases passing from the engine, andwill remain open during the period of operation of the engine. but willclose immediately with the stopping of the engine.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts hereinafter more fully describedand pointed out in the claims, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawing:

Figure 1 is a vertical sectional view through the attachment forming theessence of the present invention, showing the attachment as positionedon the discharge end of an exhaust pipe.

Figure 2 is a plan view thereof.

Figure 3 is a sectional view taken on line 3-4 of Fig. 1.

Referring to the drawing in detail, the attachment comprises a tubularbody portion 5 which is formed with slots extending inwardly from thelower end thereof to lend resiliency to the body portion and permit ofready positioning of the body portion over an exhaust pipe. The clampindicated by the reference character 6 is used to secure the bodyportion in position after it has been properl located on the dischargeend of the exhaust pipe, which in the present showing is indicated bythe reference character A.

Secured to the body portion 5, at a point adjacent to the dischargeupper end thereof, is a bracket 1 having a lower transverse portion anda pair of spaced upwardly extending arms 8 which form a bifurcated enddisposed above the cover and which are provided with openings to receivethe pivot pin 9 on which the balance arm I 0 is pivotally mounted. Thebalance arm I1! is preferably of relatively thin cross section, such asa rectangular cross section having major and minor axes, and thevertical disposition of the 3 Claims. (01. 9859) arm on the coveroperates to minimize wind effects in unsheltered areas. The pivot pointbetween the arms 8 and balance arm Ill is located close to an imaginaryupward extension of the adjacent peripheral surface of the exhaust pipeand is preferably above a longitudinal line drawn centrally through thebalance arm I B. In the embodiment shown I have disclosed the balancearm I!) in an upright position. This is especially desirable where thedevice is exposed to winds and its operation therefore might beaffected. However, it is to be understood that I do not limit myself tosuch an arrangement of parts.

The cover is indicated by the reference character H, and is of adiameter to completely close the discharge end of the body portion 5 andat the same time provide a portion which extends beyond the outersurface of the body portion 5.

Forming a part of the cover II is a depending flange I 2 which isannular in formation, the flange being wide and tapered off at its endsto a substantially narrow flange l3. Due to the construction of thisflange, a pocket is formed on the cover so that the exhaust gasescontacting the cover will collect during the initial movement of thecover to its open position, to insure the opening of the cover under theslightest pressure directed thereto. It might be further stated that thelength of the balance arm is such that the weight of the cover which isattached to one end of the balance arm, will be sufficient tooverbalance the arm to a slight degree, causing the cover to seat andclose the discharge end of the attachment when the pressure against thecover has been relieved due to the stopping of the engine. Likewise, itis to be noted that the disposition of the pivot pin 9 immediatelyadjacent the surface of the exhaust pipe and above the cover a distancesufficient to pass through the upper edge of the vertically disposed armwill permit the bottom free edge of the arm to strike the body portionof the bracket and prevent the cover from swinging open to a positionbeyond a vertical position so as to assure automatic closing of thecover.

From the foregoing it will be seen that due to the construction shownand described, the discharge end of an exhaust pipe of a tractor orstationary engine, which is usually vertical, will be completely closedto exclude the elements and prevent insects from collecting in theexhaust pipe or finding their way into the cylinders of the enginedamaging the engine.

What is claimed is:

1. An automatic protective cover assembly for the discharge and of theupstanding exhaust pipe of an internal combustion engine, and comprisinga cover member for closing the open end of the exhaust pipe, bracketmeans adapted to be secured to the exhaust pipe and including anupstanding portion disposed above said cover member in closed positionand close to a vertical projection of the adjacent peripheral surface ofthe exhaust pipe, an arm of relatively thin cross section having majorand minor transverse axes and secured to said cover member with themajor axis disposed vertically with respect to said cover member andwith a portion of said arm extending laterally of the cover member toform a. balance arm therefor, and a pivot hingedly connecting the arm tothe upstanding portion on said bracket means, said pivot being locatedintermediate the ends of said arm and adjacent the upper edge thereof ata position wherein said arm only partially counterbalances said covermember whereby to facilitate opening of the cover member under theinfluence of exhaust gases in the exhaust pipe, and wherein the loweredge of said arm can abut against said bracket means whereby to preventmovement of the cover member beyond a vertical plane through said pivotto thus assure automatic closing of the cover member when no gases areemitted from the exhaust pipe.

2. An automatic protective cover assembly as claimed in claim 1, whereinsaid cover member is provided with a depending flange snugly surroundingthe end of the exhaust pipe and having opposite the pivotal connectionfor the cover a relatively wide depending portion tapering to a narrowportion adjacent the said pivotal connection whereby to provide a pocketat the discharge end of the exhaust pipe facilitating the pressurelifting of the cover member therefrom under influence of the exhaustgases.

3. An automatic protective cover assembly for the discharge end of theupstanding exhaust pipe of an internal combustion engine, and comprisinga tubular support adapted to be connected to the exhaust pipe, a covermember for closing the open end of the tubular support, means providinga pair of upstanding lugs secured to the tubular support and disposedabove said cover member in closed position and close to a verticalprojection of the adjacent peripheral surface of the tubular support anddefining therebetween an abutment surface, an arm of relatively thincross section having major and minor transverse axes and secured to saidcover member with the major axis disposed vertically with respect tosaid cover member and with a portion of said arm extending laterally ofthe cover member to form a balance arm therefor, and a pivot hingedlyconnecting the arm to the upstanding lugs, said pivot being locatedintermediate the ends of said arm and adjacent the upper edge thereof ata position wherein said arm only partially counterbalances said covermember whereby to facilitate opening of the cover member under theinfluence of exhaust gases in the exhaust pipe, and wherein the loweredge of said arm can strike the abutment surface between said lugswhereby to prevent movement of the cover member beyond a vertical planethrough said pivot to thus assure automatic closing of the cover memberwhen no gases are emitted from the exhaust pipe.

CHARLES RALPH TAYLOR.

REFERENCES CITED The following references are of record in the

